Comparative palynological analysis of Lygodium venustum Sw. and L. volubile Sw. (Lygodiaceae)
The genus Lygodium Sw.is one of the few climbing ferns in the world.The spores of L.venustum Sw.and L.volubile Sw.were studied using light, scanning, and transmission electron microscopy.This work is based on herbarium material.The spores are trilete, triangular, with straight to convex sides in polar view.The equatorial diameter is 72-104 µm,